It all makes sense so far but one burning question remains: why do we have to pee so often after a few tipples? It turns out that this is because ethanol blocks the antidiuretic hormone, making you feel like you need to pee regularly.

And if you’re looking for someone to blame for your New Year’s hangover, you can pin it on the receptors GABA and NMDA. While the fun stimulant effects wear off, these two build up - leaving you unable to muster the energy to even get off the couch the next day.